The County of Forty Mile No. 8 is primarily agriculture based, with oil and gas activities scattered throughout the area. The County has a diversified agricultural economy based on ranching, dryland farming, irrigated specialty crops, and intensive livestock operations. There are 602 farms with a total farm area of 7,216 sq. kms.
Major employers in the County include Spitz Sunflower Seeds, Viterra, Parrish and Heimbecker, EOG and Spur Energy.